326 PROCEEDINGS OF THE ACADEMY OF 



Dipodomys heermannii, Baird, M. N. A., 1857, 415. (Compiled.) 

 Dipodomys hermannii, Gray, P. Z. S. 1868, 201. (Compiled.) 

 Dipodomys wagneri, 1 Le C, Proc. Acad. Nat. Sci. Phila. 1853, 224. Bd., 



M. N. A. 1857, 415. (Compiled.) Gray, P. Z. S. 1868, 201. 



(Compiled.) 



Hab. Pacific region at large, from Washington Territory to 

 Cape St. Lucas; Nevada; and portions of Mexico (Real del Monte, 

 Phillips). Specimens examined from Fort Walla- Walla, Cape 

 St. Lucas, and numerous localities nearly throughout Upper and 

 Lower California. 



Ghai's. Small : rather under than over four inches in length of 

 head and body, Avith slender shape, large ears, long limbs, and 

 especially long tail. Tail vertebras 2 inches (more or less) longer 

 than the head and bodj r , bearing a proportion of about (rather 

 more than less) 1.50 to 1.00. Coloration heavy: upper parts rather 

 dark mouse-brown or even dusky in general tone, lightened, espe- 

 cially on the sides, with the peculiar tawny shade of the genus. 



This animal served as the type of the genus, described by Gray 

 in 1840. It figures in various treatises, mainly under compilation. 

 Audubon gave an excellent illustration, taken from the type speci- 

 men. Macrocolus halticus of Wagner, described soon afterward, 

 is, as suggested by both Gray and Baird, undoubtedly the same 

 animal, though no mention is made of the pouches. Some other 

 unquestionable synonyms are cited above. 



Dipodomys phillipsi ordi, Woodh. 



Dipodomys ordii, "Woodh.," LeC, Proc. Acad. Nat. Sci. Phila. vi. 1853, 

 224. (Notice of Woodhouse's type). Woodh., Proc. Acad. Nat. Sci. 

 Phila. vi. 1853, 235; Sitgr. Rep. Expl. Zuni and Col. R. 1853, 50, 

 pi. 4. (El Paso, Texas.) Aud. and Bach., Q. N. A. iii. 1854, 317. 

 (Compiled.) Baird, M. N. A. 1857, 410, pi. 5, f. 1 ; pi. 21, f. 1 ; pi. 

 51, f. 1, 2. Baird, P. R. R. Rep. x. 1859, Gunnison's and Beck- 

 with's Route, Mamm., p. 8. Baird, P. R. R. Rep. x. 1859, Whip- 

 ple's Route, Mamm. p. 14. Hayd., Trans. Amer. Phil. Soc. xii., 

 1862, p. 147. (Niobrara R.) Gerr., Cat. Bones Br. Mus. 1862, 175. 

 Coues, Am. Nat. i. 1867, 395. (Habits.) Gray, P. Z. S. 1868, 

 201. Allen, Proc. Bost. Soc. xvii. 1874, 42. (Yellowstone.) 



Dipodomys montanus, Baird, Proc. Acad. Nat. Sci. Phila. vii. 1855, 334. 



Hab. Rocky Mountain region at large, and somewhat eastward, 

 from the region of the Yellowstone into Mexico. Limit of southern 



1 The ascribed locality is obviously and unquestionably erroneous. The 

 label "James Reed, South Carolina," like that on some other specimens of 

 various animals I have seen, indicates the donor and his residence. 



